For disc galaxies, Ref. [1]} found such a relation between the two attributes evaluated along the symmetry axis. Reference [2]} then showed that modified-gravity formulations of MOND predict an exact, universal such relation that applies to all mass distributions in the disc
\(\Sigma _{\scriptscriptstyle D}=\Sigma _{\scriptscriptstyle M}\mathcal {S}(\Sigma _{\scriptscriptstyle B}/\Sigma _{\scriptscriptstyle M}), \) 
